Electric driving apparatus for centrifugal machines.



No. 736,397. A PATENTED AUG. 18, 1903.

' L. HIRT. ELECTRIC DRIVING APPARATUS FCR'CBNTRII'UCAL MACHINES.

APPLICATION FILED JAN. 22, 1902. I

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= v L. HIRT. ELECTRIC DRIVING APPARATUS FOR GENTRIFUGAL MACHINES.

APPLICATION FILED JAN. 22, 1902.

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10 MODEL.

INVENTDR WITNESEES:

ATTURNEYS Patented August 18, 1903.

PATENT OFFICE.

LUDWVIG HIRT, OF GREVENBROIGH, GERMANY.

ELECTRIC DRIVING APPARATUS FOR CENTRIFUGAL MACHINES.

SPECIFICATION forming part Of Letters Patent No. 736,397, dated August 18, 1903. Application filed January 22,1902. Serial No. 90,348. (No model.)

To aZZ whom it may concern:

Be it known that I, LUDWIG HIRT, a subject of the King of Prussia, Emperor of Germany, and a resident of Grevenbroich, Prussia, Germany, have invented certain new and useful Improvements in Electric Driving Apparatus for Centrifugal Separators, of which the following is a specification.

This invention refers to improvements in centrifugal machines for separating liquid from substances, and has in particular reference to that kind of centrifugal machines in which the surrounding mantle, the framing of the machine, the rotating vertical axle, with its drum or basket, rest on a semicircular socket, so that the entire machine is kept in equilibrium by buffers connected to and surrounding the said mantle; and this invention furthermore refers to centrifugal machines of the above-named kind which are driven by an electromotor in direct connection with the vertical axle; and this invention finally refers to centrifugal machines of the above-named kind in which an electric motor is employed and in which provision is made for readily removing the motor with a minimum of disturbance of other parts of the machine. It has proved to be a desirable object to mount such centrifugal machines in upper stories of sugar factories, as such mounting and working of the machines would materially assist the regular course of manufacturing; but for several reasons, and especially since such centrifugal machines have become of very considerable weight by their construction and by their interior arrangement, together with the load of massecuite to be treated, such mounting in upper stories has never been looked upon favorably.

Now by this invention the centrifugal machines, notwithstanding their own heavy weight and the heavy weight of their load,

may easily be mounted at any height in the building of the factory and may be carried there by supports in the form of double T- bearers or girders arranged underneath the hemispherical socket on which the entire machine is kept in balance without any other rigid fixture of the said machine except the surrounding frame with the buffers,

which latter are in loose connection only with the protecting-mantle to keep it in balance and which by no means add to the carrying of any part of the machine.

, By the present invention I am furthermore enabled to give a strong hold or support to the field-magnets and their framing of the electromotor in the framing of the centrifugal machine, while the armature of such eleotromotor is mounted on the vertical axle, in order to rotate the latter. By mounting the entire machine on a hemispherical socket on which it is equilibrated by the buffers surrounding the mantle the said axle will partake of the small oscillations of the framing of the machine, and so the armature on said axle and the electromagnet on the machine-framing will be identically oscillated and no variations in the distance between the armatures surface and the surfaces of the poles will take place.

In case the armature would be mounted on the axle and the field-magnets were mounted on a separate framing the axle would have to be provided with a collar-bearing equilibrized by buffers connected to the main and rigid framing of the centrifugal machine,

and in such case the protecting-mantle would be made rigid and did in no way partake of the oscillations.

In carrying out myinvention as to the just-described arrangement of the motor I may lift the axle with its armature out of the field-magnets without disturbing the latter and their connection with the centrifugal machines framing in any way.

In carrying my centrifugal machine on girders or beams, which form a part of the construction of the building, I provide means for easy access to the semicircular socket, the step-bearing, and adjacent parts by mounting these parts on a slide, which by screws,

and counter-plates may easily be loosened to be shifted sidewise for the purpose in view.

In order that my invention maybe fully understood, I will now describe the same, with reference to the annexed drawings, in which- Figure l is a side view of the centrifugal machine, partly in section; and Fig. 2 is a view of same at right angle to Fig. 1, also partly in section.

In the said figures, a is the protecting-mantle surrounding the drum or basket I), which latter is mounted on the axle c. The framing d of the centrifugal machine is rigidly connected to the mantle a, and from the framing 61 the collar-bearing e for the axle 0 projects inwardly, while the lower part of said framing ends, so that the semicircular-shaped pivot f may be fastened to it in any convenient manner. All these parts above named rest with the semicircular pivot fin the semicircular socket g, so that the latter carries the entire machine, except the frame h, which surrounds the mantle a, and in which frame suitable buffers 71 are arranged, said bufi ers 'i being loosely connected to the mantle for equilibrizing the entire machine on the semicircular socket g. This socket is mounted on the slide is, which rests on the beams or girders Z Z and to which latter it is secured by bolts m and counter-plate a. By this description it is obvious that the entire machine, with all its parts and with the only exception of said bufier-frame h, rest on these two girders or beams Z Z, which may form part of the building construction at any convenient height. The slide his provided with a plate, which in its upper part forms the semicircular socket g and which at its lower surface forms a curve identical or parallel with the curve of the socket, and said plate and socket have a hole for a screw-bolt p to pass into the pivotf and to hold a curved plate 0 against the curved lower surface, so that any vibrations of the machine and of its pivot fwill be transmitted to said plate 0, which as its main duty will counteract any tendencyof the machine to move vertically. If screwbolt p, plate 0, screw-bolts m, and plate a are removed, the entire machine may be raised for a small distance, so that the socket g on the slide may be shifted sidewise, and pivot fand socket g, forming the main support, and the step-bearing r, forming the support of the axle 0, may be inspected, repaired, or replaced by new parts.

The electric motor tis placed and fixed by its support it u upon the main framing, so that the field-magnets and adjacent parts are thus carried, while the armature is fixed on the axle a. With this construction any extra collar-bearing for the axle except that within the drum is dispensed with, as all parts named above the socket g (with the exception of the buffer-frame h) are so connected as to partake in the vibrations or oscillations of the mantle a.

The framing d on which the field-magnets rest or on which the latter are fixed is formed in the shape of a hanging strap y 3 rigidly connecting the mantle and all upper parts with the lower hemispherical pivot, and the vertical axle c is divided at at, coupled at this point by nuts 8 S. If an inspection of the motor becomes necessary, theaxle-coupling is loosened, the screw or key for keeping the armature on the axle is taken out, the drum,

with its shaft or spindle, is hoisted, and the entire motor, including field-magnets and armature, may then be removed sidewise, and after inspection and repair may in the same easy manner be remounted upon the framing and the armature connected to its axle.

The detail construction of the step-bearing is not claimed by me in this application, as it forms the subject-matter of another application for a United States patent, filed by me June 9, 1903, Serial No. 160,734.

I claim- 1. The combination of the casing provided with an open-work member or strap, a driveshaft made in two sections, one of which is movable lengthwise, a motor surrounding the movable section of the shaft and capable of being removed transversely through the open-work member of the frame, said motor being arranged to drive the shaft, and means for connecting the shaft-sections.

2. The combination with the casing, of a shaft journaled therein and made in two sections, one of which is movable lengthwise, driven mechanism connected with said movable shaft-section, a universal supportingjoint connected with the other shaft-section, a motor normally connected with the longitudinally-movable shaft-section, and adapted to be disconnected therefrom by a longitudinal movement of said shaft-section, said motor being removable from the machine when disconnected, and means for coupling the shaft-sections.

3. The combination with the shaft, a universal step-bearing therefor, a frame supported through the medium of said shaft and means for holding said frame against rotation while allowing it to yield in any direction, of a motor carried by said frame and having a detachable connection with said shaft, the motor being removable from the frame sidewise, and driven mechanism connected with said shaft.

4:. In a centrifugal machine the combination of a rotating drum provided with a protecting-casing and mounted upon a shaft carried by a frame, said frame being in rigid connection with the protecting-casing and provided with a universal joint adapted to support said frame and thereby the entire machine, and an electric motor detachably connected with said shaft and the frame and capable of being removed sidewise from said frame without dismounting said shaft and rotating drum, said protecting-casing being surrounded by a frame and provided with a plurality of buffers which are in loose connection with the casing and tend to maintain the centrifugal machine in a stationary vertical position.

5. The combination of a drum provided with a protectingcasing and mounted upon a shaft carried by a frame, said frame being provided with a plurality of buffers which tend to maintain it in stationary vertical pomy invention I have signed my name, in sition, means for rotating such shaft and a presence of two Witnesses, this 20th day of universal joint adapted to support said frame December, 1901.

and consisting of a hemispherical projection LUDWIG I-IIRT. 5 upon said frame-engaging hemispherical Witnesses: Y

socket. HERNANDO DE SOTO,

In testimony that I claim the foregoing as CARL KNOOP. 

